Basically I completly forgotten how to do these stuff, first 3 is to do them and make them as simple as possible, the other two is just to solve the equations.
1)
The common denominator is 18. So, amplify the first fraction by 3, the second by 2 and the third by 6.
2), 3)For the next two problems use the properties:
4)
, where
5) Factorize and then make a table with the sign of each factor, and then use the rule of signs.